EP1793884A2 - Verfahren und gerät zur auflösung von obstruktionen, widerstand oder instabilität der oberen atemwege - Google Patents

Verfahren und gerät zur auflösung von obstruktionen, widerstand oder instabilität der oberen atemwege

Info

Publication number
EP1793884A2
EP1793884A2 EP05789482A EP05789482A EP1793884A2 EP 1793884 A2 EP1793884 A2 EP 1793884A2 EP 05789482 A EP05789482 A EP 05789482A EP 05789482 A EP05789482 A EP 05789482A EP 1793884 A2 EP1793884 A2 EP 1793884A2
Authority
EP
European Patent Office
Prior art keywords
patient
air
rise time
patient interface
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05789482A
Other languages
English (en)
French (fr)
Other versions
EP1793884A4 (de
EP1793884B1 (de
Inventor
Peter Edward Bateman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resmed Pty Ltd
Original Assignee
Resmed Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2004905584A external-priority patent/AU2004905584A0/en
Application filed by Resmed Pty Ltd filed Critical Resmed Pty Ltd
Priority to EP12162509.9A priority Critical patent/EP2510966B1/de
Publication of EP1793884A2 publication Critical patent/EP1793884A2/de
Publication of EP1793884A4 publication Critical patent/EP1793884A4/de
Application granted granted Critical
Publication of EP1793884B1 publication Critical patent/EP1793884B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0066—Blowers or centrifugal pumps
    • A61M16/0069—Blowers or centrifugal pumps the speed thereof being controlled by respiratory parameters, e.g. by inhalation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0066—Blowers or centrifugal pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/0858—Pressure sampling ports
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0875—Connecting tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
    • A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • A61M2016/0039—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the inspiratory circuit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A61M2205/502—User interfaces, e.g. screens or keyboards
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/40—Respiratory characteristics
    • A61M2230/46—Resistance or compliance of the lungs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/63—Motion, e.g. physical activity

Definitions

  • the invention relates to non-invasive positive pressure mechanical ventilation, and to methods and apparatus for treatment of sleep disordered breathing..
  • the '345 patent describes a method and apparatus for resolving flow limitation by increasing the CPAP pressure provided to the patient until the shape of the flow curve becomes suitably rounded. Ih some cases, during non-invasive positive pressure mechanical ventilation, increasing the end-expiratory pressure alone may not resolve the upper airway obstruction, resistance or instability. Increasing End Expiratory Pressure (EEP) may lead to a decrease in patient comfort as the result of the increase in both Expiratory Positive Airway Pressure (EPAP) and Inspiratory Positive Airway Pressure.
  • EEPAP Expiratory Positive Airway Pressure
  • EPAP Expiratory Positive Airway Pressure
  • the present invention is directed towards an alternative method and apparatus for resolving upper airway obstruction, resistance or instability.
  • a ventilator in accordance with one form of the invention there is provided, in a ventilator, a method for reducing or eliminating upper airway obstruction, resistance or instability by adjusting the rise-time of the ventilator.
  • obstruction, resistance or instability in the upper airway is reduced by increasing the rise time.
  • the shape of the inspiratory portion of the respiratory airflow is continuously monitored and upon detection of a shape indicative of the presence of upper airway obstruction, resistance or instability ventilator rise-time is adjusted.
  • rise time is increased.
  • the invention provides a method for operating a CPAP apparatus having a flow generator, a patient interface, an air delivery conduit for delivering air from the flow generator to the patient interface, and a control mechanism that causes air to be delivered through the air delivery conduit at desired pressures at the patient interface, the method comprising the steps of:
  • a further form of the invention provides a method for reducing or eliminating upper airway obstruction, resistance or instability by use of a CPAP apparatus having a variable rise time from EPAP to IPAP comprising the step of increasing the rise time of the apparatus in response to an indication of an upper airway obstruction, resistance or instability.
  • a further form of the invention provides a CPAP apparatus having a flow generator, a patient interface, an air delivery conduit for delivering air from the flow generator to the patient interface, and a control mechanism that causes air to be delivered through the air delivery conduit at desired pressures at the patient interface, said apparatus having:
  • a higher level (PAP) suitable for inhalation, wherein the time for the flow generator to increase the pressure from EPAP to IPAP is a variable rise time; and (iii) a controller for monitoring the shape of the inspiratory portion of the respiratory airflow and, upon detection of a shape indicative of the presence of upper airway obstruction, resistance or instability, increasing the rise-time.
  • PAP higher level
  • a further form of the invention provides a CPAP apparatus having a flow generator, a patient interface, an air delivery conduit for delivering air from the flow generator to the patient interface, and a control mechanism that causes air to be delivered through the air delivery conduit at desired pressures at the patient interface, said apparatus having:
  • a higher level positive air pressure suitable for inhalation, wherein the time for the flow generator to increase the pressure from EPAP to IPAP is a variable rise time
  • a further form of the invention provides apparatus for treating sleep disordered breathing comprising:
  • a controllable source of breathable gas at positive pressure an air delivery conduit and patient interface adapted to provide gas from said source to the entrance of a patient's airways; a flow transducer adapted to provide a flow signal indicative of the respiratory flow of air to the patient's airways; a controller programmed to determine the beginning of an inhalation portion of a patient's respiratory cycle from said flow signal and thereupon to increase the pressure of breathable gas from said source from an exhalatory pressure to an inhalatory pressure within an adjustable risetime; and wherein said controller is further.adapted to determine an index of upper airway obstruction from said flow signal and adjust said risetime as a function of said index. [0013] Preferably, when said index of upper airway obstruction indicates partial upper airway obstruction, said controller increases said risetime.
  • said index is a shape index, and more preferably a flattening index.
  • the index may be a snore index or a hypopnea index.
  • FIG. 1 shows the inspiratory portion of a flow-time curve for a normal breath and a partially obstructed breath (reproduced from US Patent 5,704,345);
  • Pig. 2 shows a ventilator, air delivery conduit and patient interface
  • FIG. 3 shows an embodiment of the invention in which flow flattening is resolved.
  • FIG. 2 shows apparatus suitable for performing the invention.
  • a ventilator 5 provides a supply of air or breathable gas at positive pressure along an air delivery conduit 60 to a patient interface 50, which in the illustrative form is a mask.
  • a sensing line 70 provides a means for the pressure sensor 75 to measure pressure within the patient interface 50.
  • a volumetric or mass flow sensor 120 measures the flowrate of air along the air delivery conduit 60.
  • An electric motor 20 and its impeller 10 reside in a volute 25 and are under the control of a programmable controller 40.
  • There is a keypad 80 and display 90 allowing various parameters to be adjusted.
  • There is an interface 100 enabling data transfers between the ventilator 5 and other devices, such as a computer or controller (not shown).
  • a range of pressures of air can be provided depending upon the speed of the blower 20.
  • Abase level of positive air pressure (sometimes referred to as the "EEP” or the “EPAP”) is delivered during the expiratory portion of the patient's respiratory cycle. Air at a higher pressure is delivered to the patient during the inhalation portion of the breathing cycle (sometimes referred to as the "IPAP").
  • the blower is accelerated to the speed necessary to deliver IPAP.
  • the time taken for the device to increase the pressure from EPAP to IPAP is termed the "rise time”.
  • Ventilator 5 delivers a breath of air to the patient having a pressure-time profile generally resembling a square wave, although a range of pressure-time profiles are known.
  • the ventilator is intended to synchronise with patient efforts, that is it delivers a breath when patient effort to breathe can be detected.
  • the ventilator may also be enabled to trigger automatically into IPAP in the case that patient effort is not detected during some operator determined maximum allowable period.
  • a variety of methods may be used in an attempt to monitor patient effort, including pressure and flow sensors, bands around the chest and abdomen and suprasternal notch effort sensors. For example, where inspiratory airflow is taken to be of positive sign and expiratory airflow is taken to be of negative sign, when the airflow crosses zero from negative to positive (or a near zero threshold) the patient is assumed to be attempting to inhale.
  • Fig. 3 shows an embodiment of the invention.
  • Trace (i) the upper most trace, shows patient flow (ml/s) with respect to time, where positive pressure indicates inspiration.
  • Region a lies between the broken lines indicating an inspiratory portion.
  • Arrow b points to a flattened inspiratory portion within region a.
  • Region c indicates a rounded inspiratory portion in which flattening has been resolved.
  • Trace (ii) the middle trace, shows mask pressure (cm H 2 O) with respect to time.
  • Trace (iii) the bottom trace, shows the pressure rise time (ms).
  • the patient receives a supply of air at about 13.5 cm H 2 O during inspiration and approximately 10 cm H 2 O during exhalation.
  • the rise time is set to approximately 150 ms.
  • the rise time is increased to 500 ms for the sixth breath, and it can be seen by a comparison of regions a and c, that the effect of increasing the rise time has been to resolve the flattening.
  • a measure may be gained of the number of occurrences and duration of airway instability incident experienced during a treatment session and during an extended course of treatment sessions. This information can serve as an indication as to the patient's condition or to tune ventilator settings.
  • One of the advantages of the invention is that it can lead to greater comfort for the patient and at the same time increase efficacy and compliance with therapy.
EP05789482.6A 2004-09-28 2005-09-28 Gerät zur auflösung von obstruktionen, widerstand oder instabilität der oberen atemwege Not-in-force EP1793884B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12162509.9A EP2510966B1 (de) 2004-09-28 2005-09-28 Vorrichtung zum Lösen von Instabilität der oberen Atemwege

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2004905584A AU2004905584A0 (en) 2004-09-28 Method and Apparatus for Resolving Upper Airway Obstruction, Resistance or Instability
PCT/AU2005/001493 WO2006034549A2 (en) 2004-09-28 2005-09-28 Method and apparatus for resolving upper airway obstruction, resistance or instability

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP12162509.9A Division EP2510966B1 (de) 2004-09-28 2005-09-28 Vorrichtung zum Lösen von Instabilität der oberen Atemwege
EP12162509.9 Division-Into 2012-03-30

Publications (3)

Publication Number Publication Date
EP1793884A2 true EP1793884A2 (de) 2007-06-13
EP1793884A4 EP1793884A4 (de) 2009-12-30
EP1793884B1 EP1793884B1 (de) 2013-04-17

Family

ID=36119243

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05789482.6A Not-in-force EP1793884B1 (de) 2004-09-28 2005-09-28 Gerät zur auflösung von obstruktionen, widerstand oder instabilität der oberen atemwege
EP12162509.9A Not-in-force EP2510966B1 (de) 2004-09-28 2005-09-28 Vorrichtung zum Lösen von Instabilität der oberen Atemwege

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12162509.9A Not-in-force EP2510966B1 (de) 2004-09-28 2005-09-28 Vorrichtung zum Lösen von Instabilität der oberen Atemwege

Country Status (4)

Country Link
US (3) US8413654B2 (de)
EP (2) EP1793884B1 (de)
ES (1) ES2425864T3 (de)
WO (1) WO2006034549A2 (de)

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Also Published As

Publication number Publication date
WO2006034549A2 (en) 2006-04-06
EP1793884A4 (de) 2009-12-30
US20150151062A1 (en) 2015-06-04
US20130312753A1 (en) 2013-11-28
EP1793884B1 (de) 2013-04-17
WO2006034549A3 (en) 2006-10-19
ES2425864T3 (es) 2013-10-17
US8985109B2 (en) 2015-03-24
US20090007914A1 (en) 2009-01-08
US8413654B2 (en) 2013-04-09
EP2510966B1 (de) 2014-01-15
EP2510966A1 (de) 2012-10-17
US9968751B2 (en) 2018-05-15

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